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Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (8): 1761-1771.doi: 10.16420/j.issn.0513-353x.2021-0326

• Research Notes • Previous Articles     Next Articles

The Analyses of Target Metabolomics in Flavonoid and Its Potential MYB Regulation Factors During Coloring Period of Winter Jujube

XU Haifeng1, WANG Zhongtang1, CHEN Xin1, LIU Zhiguo2, WANG Lihu3, LIU Ping2, LIU Mengjun2, ZHANG Qiong1,*()   

  1. 1. Shandong Institute of Pomology,Tai’an,Shandong 271000,China
    2. Research Center of Chinese Jujube,Hebei Agricultural University,Baoding,Hebei 071000,China
    3. College of Landscape and Ecological Engineering,Hebei University of Engineering,Handan,Hebei 056038,China
  • Received:2021-11-17 Revised:2022-01-07 Online:2022-08-25 Published:2022-09-05
  • Contact: ZHANG Qiong E-mail:Zhangqiong@shandong.cn

Abstract:

In our study,the white(W),semi-red(SR_R,SR_W)and full-red(R)pericarps of winter jujube were used as materials,we analyzed components and changes of flavonoids in different coloring periods using targeted metabolomics. The phylogenetic tree of MYB family in winter jujube was constructed,and the potential MYB regulators associated with flavonoid synthesis were analyzed using transcriptomic analysis. The results showed that the differential metabolites between colored and uncolored pericarps were 291(R vs W),196(R vs SR_W),297(SR_R vs SR_W),and 201(SR_R vs W),respectively. There were 98 differential metabolites in the four comparison groups. Further analysis of KEGG revealed that the shared differential metabolites of four comparison groups mainly enriched in secondary metabolites,phenylpropanoids and flavonoid biosynthetic pathways. The 126 flavonoids were detected during the coloring period of winter jujube pericarp,including thirteen anthocyanins,fifty-three flavones,twenty-eight flavonols,eight isoflavones,five proanthocyanidins and nineteen flavanols. Along with the coloration of winter jujube pericarp,three anthocyanins,three flavones and three flavonols increased significantly,while procyanidins and flavanols(catechin,epicatechin)decreased significantly. Fourteen potential MYB regulators associated with flavonoid synthesis were screened via cluster analysis of MYB family. The analyses of transcriptome and qRT-PCR showed that twelve MYB transcription factors were down-regulated with the coloration of winter jujube pericarp,while LOC107434709 and LOC107404750 had higher expression levels in colored pericarp of winter jujube. This suggested that they might play positive roles in the coloring process of winter jujube.

Key words: jujube, coloring period, flavonoid, MYB transcription factors

CLC Number: